Hi Everybody,
The 'audio switch' that you refer to is actually done in the Main RX
dsp. The only way to control it is with the AUDIO menu, where you can
choose the signals for the Speaker, the Right Aux Out, and the Left Aux
Out. The choices for each one will be Main, Sub, or Both.
The Main RX DSP Codec inputs are the Main RX 14 KHz IF, and the MIC
input. The Outputs are Transmit 14 KHz IF, and the Speaker.
The Sub RX DSP Codec inputs are the Sub RX 14KHz IF, and the Aux Input.
The Outputs are the Left Aux Output and the Right Aux Output.
The Main RX DSP sends its digitized receive audio to the Sub RX DSP, and
the Sub RX DSP sends its digitized receive audio and the digitized Aux
Input to the Main RX DSP. This is needed so the Sub RX received audio
can be heard on the Speaker, and the Main RX received audio can be on
either or both of the Aux Outputs. The Main RX needs the Aux Input so
it can be used as an audio input.
So, yes, it is even a little more convoluted that it first appears. By
the way, the Orion II does it a little differently, and there is a 6
channel audio mixer that routes the signals where they need to go.
Maybe that was what you remembered as the 'audio switch'.
I would suggest that you try using the ANT 2 connector, and see if that
changes the Sub RX. Be sure to set the PWR control to OFF so you don't
inadvertently try to transmit into a no antenna condition.
Also, be sure that the NB, the NR, the NOTCH/SAF, and the AN are OFF for
the Sub RX. Also be sure that the SAF/NOTCH tracking between the Main RX
and the Sub RX is off.
Finally, would you report the firmware version that is currently
installed on your Orion. You can see this by pressing and holding the
MENU button until the Startup Screen appears.
73..
Howard, WA9AXQ
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